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A member asked:

How big does the fetus have to be - mm/cm - in order to have the nt scan performed?

A doctor has provided 1 answer
Dr. Jeff Livingston answered

Specializes in Obstetrics and Gynecology

Weeks : One does that test based on gestational age not size. It's done between 11-13 6/7 weeks.

Answered 1/10/2015

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Related Questions

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If ultrasounds have margin of error, how do u know when you're within the range of when the NT scan should be done?Does fetus have to be certain size?

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I had ultrasound on 01/20/14, with the baby measuring at 4.8 cm, is this accurate for a dating of 11weeks 4 days fetus?

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My doctor checked me and i'm 2cm but can be stretched to 3 CM and my doctor moved my fetus head to get him to reacted but only slight reaction could they be something wrong . My baby moves only in the early mornings and late at night?

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What is the error of margin for an ultrasound dating at 11 week 4 day, measuring the fetus crl at 4.8 cm?

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